Drill-sharpening mechanism



V P. SCHEIB. DRILL SHARPENING MECHANISM.

APPLICATION FILED MAR. 25,19I8.

. I I H Patented Aug.- I @9205 2 SHEETS? HE '1.

UNITED STATES PATENT OFFICE.

PETER SCHEIB, OF DENVER, COLORADO, ASSIGN'OR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DlilhTlililR, COLORADO, A CORPORATION OF DELAWARE.

DRILL-SHARIENING MECHANISM.

Specification of Letters Patent. Patented Aug. 10, 1920.

Application filed March 25, 1918. Serial No. 224,616.

To all whom it may concern Be it known that I,-PETER SCHEIB, a citizen of the United States, residing at Denver,

in the county of Denver and State of C010- rado, have invented certain new and useful is held in the hand of the operator and struck by a manually operated hammer.

One ofthe principal objects is to provide mechanism that will effectively sharpen this steel and insure its proper shaping.

Another object is to provide mechanism .of the above character which may be utilized on a well known type of mechanically operated drill sharpening apparatus.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a plan view of a portion of one of the die members of a well known type of drill sharpener, showing the improvements in place thereon.

Figs. 2 and 3 are respectively sectional views on the lines 2-2 and 33 of Fig. 1, but including the upper die members.

Fig. 4 is a sectional view at right angles to Figs.2and 3. V a

Fig. 5 is a detail view of a drill bit at one stage of construction.

Fig. 6 is a similar view of the completed bit.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, the usual die members 7 and 8 are provided that are relatively movable toward and from each other. Each member is provided with a socket 9 to receive the ordinary shaping dies 10, with which cooperates a dolly 11 in amanner Well understood to thoseskilled in the art.

In the present embodiment the members 7 and 8 are provided alongside the sockets 9 with recessed seats 12 in which are detachably located die blocks 13. These blocks are provided in their opposing faces'with sockets 14;, a part of each socket being semicircular in cross section, as illustrated in Fig.3, and the remainder being angular in cross section, as illustrated in Fig. 2. In the angular portions are detachably located cutting dies 15. Each of these dies is square in cross section, thereby producing four cutting edges, one of which projects from the socket and cooperates with the corresponding projecting edge of'the other die, as will be clear by reference to Fig. 2. The angle formed by the projecting faces of'these cutting dies corresponds to the desired angle of the cutting bit. In the semi-circular portions of the sockets 14 are detachably fitted cylindrical dies 16 that also project from the faces of the die blocks, as will ,be clear by reference to Fig. 3. The curved faces of these dies are preferably roughened or knurled as illustrated in Fig. 1. They are held against rotation by keys 17 detachably fitted in registering seats 18 formed in the die blocks and the dies. Preferably each of the dies 16 has a plurality of the seats, so that the keys 17 can be detached and the dies turned to present different portions of the surfaces for operative work, as hereinafter described. It will also be noted that the circular dies have bores 19 therethrough and that when the parts are in place, as illustrated in Fig. 4, the dies are held against detachment from the open ends of the sockets 14. by the shaping dies 10. It will be noted that when the die members are to- I the dies 16 and the die members are brought together upon the same. The corner is then drawn out, after which the other corner is correspondingly operated upon, producing a structure of the general character illustrated in Fig. 5. When this has been completed, the bit is placed between the dies 15 and the die members are again brought together, not only cutting ofi a square edge,

as will be clear by reference to Fig. 2, but properly shaping the intersecting faces that produce said edge and resulting substantially in the structure illustrated in Fig. 6.

' It will thus be seen that a bit can be properly V shaped and sharpened by one heating and can be.producedquickly and expeditiously without the exercise of the care that is necessary in hand sharpening. -Whenthe operative'edges. of the cutting dies become" dull or. misshapen from any cause, itisonly necessary to remove them, partially.

rotate them and reinsert them, whereupon new cutting edges are presented This re- ;moval can be accomplished by removing the die blocksfrom their seats, and-insert- ,ing a suitable ejecting tool through-the bores 1901 13116 dies 1' 6., lVhen the coeperating faces of said dies 16- become wornnew portions thereof can be presented by re; movingthe keys l8 and partiallyrotating the dies, or turning them endl'for end.

I From the foregoing, it is thought that the construction, OPGHttLOII and many advantages of the herein described invention will beapparent to-those skilled in the art, Vwithout-further description, and it will be understood that various changes in the size, shape, proportion, and minor details of con- I transversely. totlie die receiving month, said Struction, within the scope of the claims may be resorted to without departing from i I V the spirit or sacrificing any of the advanta es of the invention. V r

aving thus fullydescribed my inven- .tion, whatI claim as new, and desireto secure by Letters Patent, is i 1. In drill sharpening apparatus, the

combination with relatively movable die members, sa d members having anopen drillsteel receiving mouth between them, of dies carried by thedie members and located dies having/ reacting rounded corner drawing faces.

movable toward and from each otherrand. having a drill steel receiving mouth between them-,of dies carried thereby and extending transversely t0 the die-receivingmouth, said dies having curved operative faces, and.

. meansforsecuring the dies with different El-In; drill sharpeningapparatus, the combination with die members relatively 7 portions of the faces in coacting relation.

'3. In drill-sharpening apparatus, the combination with die .mem-bers relatively ,movable toward and fromeach other and -;having die receiving. sockets, and dies.

mounted in the sockets, said dies being ro- '-tat,able' to present different active faces, seats formed inthe dies and members and registeringwhen the formerare differently placed in the sockets, and keys engaging in fthe-seats forsecuring the dies in place.

4. In 'drill sharpening apparatus, the

' c ombin-ation with die members relatively the dies correspon'di'n the members movable toward and from each other and having angular. overhung sockets opening through their adjacent sides, of dies in the sockets and correspondingly angular --in -cross section, forming avplu'ralityfof; cutting edges,'said dies having certain-of said edges 'pro ec t1ng from the sockets and being detachable to permit the use of any ofthe cut- 'ingedges, the angular faces of the dies corresponding .to the desired angular bit faces to be out.

.6. In drill sharpening apparatus, the

combination with die blocks relatively mov-- rableqtoward and from-e'achother and having sockets partly angular and partly curved inv crosssection, of drawing and cutting dies located end to end in the sockets and each held against longitudinal displacement by .the other.

7. In dril-l sharpening .appar atuspthe combination with die blocks relatively movj .able toward and from eachotherand having "sockets partly angular and partly curved in crosssection, of drawing and cutting dies detachably located end .to end in .the sockets,.certain of the diesrhaving op ings therethrough to receive an ejector for the other of said dies.

8. In. drill sharpening apparatus, the

combination with die members having recessed seats, of die blocksin the seats having sockets in their opposing faces, and dies detachably engaged in thesockets.

9. In ndrill sharpening apparatus, the combination .withd e members having recessed overhung seats, saidseatsihaving open ends, of die blocks in thevseats having sockets in their opposing faces, and. dies engaged in" the sockets and detachable through the open ends thereof and other dies carried by and constituting retaining means forthe first mentioned dies.

10. In drill sharpening apparatus, the combination with die blocks having recessed seats provided with open ends, of coacting t-dies n the seats, and shaping dies movable with the die blocks and constituting retaining means for the'said .coacting'diesr 11.- In": drill sharpening apparatus, the

combination with die members relatively movable toward and from each other, said the members having recesses formed side by side in their opposing faces, die blocks located in certain of the-recesses and having open ended sockets, "dies inthe sockets", and

posed in spaced relation when the cutting dies are together.

In testimony whereof I aflix my signature in the presence of two witnesses.

PETER SOHEIB. Witnesses SULLIVAN P. JOHNSON, EDWARD L. OLDHAM. 

